Sheet metal cutting device

ABSTRACT

A sheet metal cutting device incorporating a sheet feed table on which a bottom blade and bottom transverse blade are mounted integrally, a top blade borne in a pivotable beam and a transverse top blade mounted perpendicularly to the latter, said transverse blade being mounted about the axis of said beam in a vertical plane perpendicular to the cutting plane of the top blade and being guided at the sides by adjustable guide elements. The transverse top blade is mounted to pivot on a lateral prolongation of the axis of rotation of the beam and the two top blades are pivoted independently of one another and can be individually operated each by its own separate actuating element.

United States Patent [72] Inventor Eduard Htmni 2,936,663 /l960 Gautron83/599X Zofingen, Switzerland 3,387,523 6/1968 Pray 83/609X [2]] Appl.No, 762,777 1,468,228 /l923 Dobazenecki 83/599 [22] Filed Sept. 26,19692,255,812 /1941 Rickman 83/597X [45] Patented Mar. 9, 1971 Primar yExammer-Andrew R. Juhasz [73] Asslgnee gs gg z zgfixg AssistantExaminer-James F. Coan Priority Oct-4,1967 Attorney Abraham A. Saffitz[33] Austria [31] A90l8/67 [54] SHEET METAL CUTTING DEVICE I ABSTRACT: Asheet metal cutting device incorporating a sheet feed table on which abottom blade and bottom trans- 2 Claims, 3 Drawing Figs.

, verse blade are mounted integrally, a top blade borne m a U.S.

piyotable beam and a transverse top blade mounted perpen- 83/564,83/598, 83/609 dicularly to the latter, said transverse blade beingmounted [51 1 about the axis of said beam in a vertical planeperpendicular {0 Field of Search the cutting plane of the top blade andbeing guided at the sides 597, 609, 610, 549, 673, 3; 83/519 byadjustable guide elements. The transverse top blade is mounted to pivoton a lateral prolongation of the axis of rota- [56] References Cm tionof the beam and the two top blades are pivoted indepen- UNYTED STATESPATENTS dently of one another and can be individually operated each1,446,460 [1923 Hermani 83/564X by its own separate actuating element.

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INVENTOR EDUARD HANNI BY mu 1/ Z ATTORNEY INVENTOR EDUARD HANNI ATTORNEYY MW g l SHEET METAL CUTTING DEVICE BACKGROUND OF THE INVENTION Thepresent invention relates to a sheet metal cutting device incorporatinga bottom blade mounted integrally on a sheet feed table, a top bladeborne in apivotable beam and a transverse blade mounted perpendicularlyto the latter.

Since, using existing sheet metal cutting devices of the foregoing type,it is possible to cut plates along one side only,

it is necessary to proceed as follows if for example it is desired tocut a rectangular plate to a defined size:

The uncut plate is fed into the machine, the first edge is cut, theplate is then turned through 90, again cut, and so on until all fouredges have been cut. Devices of this type have the followingdisadvantages: I

A great deal of time is spent in turning the plate; in addition therepeated turning entails the risk of damage, for example by scoring; andfinally there is a danger that if the plate is not fed with sufficientcare into the machine the cutting angle will deviate from an exact 90.

The object of the invention is to introduce a sheet metal cutting devicewhich permits extremely rapid and precise cutting to size of rectangularplates. It is characterized by the fact that the transverse blade isarranged to pivot about the axis of the pivotable beam in a verticalplane perpendicular to the cutting level of the top blade and is guidedat the sides by adjustable guide elements. This permits one to cut aplate to a desired rectangular size with two cuts anda single turn.

It is preferable for the transverse blade, which functions as a topblade, to be mounted to pivot on a lateral prolongation of the axis ofrotation of the pivotable beam.

In addition, the two top blades are movable individually toward and awayfrom each other and independently of one another and each operable byits own separate actuating element.

The appended drawings illustrate one example of the execution of thesubject of the invention, namely:

FIG. 1 shows a diagrammatic view from above of the proposed device;

FIG. 2 shows a section in accordance with the line A-A in FlG.ll;and

FIG. 3 shows a section in accordance with the line B-B in FlG. 1.

The proposed sheet metal cutting device incorporates a plate feed table1 in which are mounted a first bottom blade 2 and a second bottom blade3 at right angles to it. Provided in addition is a beam 4 capable ofbeing pivoted about the two shafts 5 and 6 and incorporating a first topblade 7. A second top blade 9 is mounted to pivot on a prolongation 8 ofthe shaft 6. The top blade 7 operates in conjunction with the bottomblade 2 and the top blade 9'with the bottom blade 3.

The two pairs of blades are connected to a mechanical, electrical orhydraulic driving device not illustrated.

The top blade 9 is guided at the sides by guiding elements 10, 10, 10',11 and 11', and these-guiding elements are adjustable.

In order to cut a plate to a rectangular shape, the following operationsare now necessary: the uncut plate is fed into the sheet metal cuttingdevice and both pairs of blades are actuated simultaneously. By thismeans two adjacent plate edges are simultaneously cut at right angles toone another. The plate is then withdrawn, turned about diagonally andagain cut with both pairs of blades simultaneously. It is thus possibleto cut the plate to the desired rectangular size with two cuts and asingle turn. In addition, it is possible for example to feed a longsheet of metal through the device, one pair of blades cutting alongitudinal edge to size while the resultant metal strip can be cutinto pieces by the second pair of blades, without the need to withdrawthe sheet from the device and reintroduce it facing another way. In thiscase the two pairs of blades are actuated independently of one another.

lclaim:

1. A sheet metal cutting device comprising a sheet feed table on which abottom blade and atransverse bottom blade are integrally mounted atright angles to each other, a first top blade mounted on a pivotablebeam, a transverse top blade mounted perpendicularly to said first topblade, said transverse top blade being pivotably mounted on a lateralprojection along the axis of said pivotable beam and moving in avertical plane perpendicular to the cutting plane of the top blade,guiding means at the sides of each of said two top blades includingadjustable guide elements.

2. A sheet metal cutting device in accordance with claim 1, includingactuating means for independently and separately operating each of saidtwo top blades.

1. A sheet metal cutting device comprising a sheet feed table on which abottom blade and a transverse bottom blade are integrally mounted atright angles to each other, a first top blade mounted on a pivotablebeam, a transverse top blade mounted perpendicularly to said first topblade, said transverse top blade being pivotably mounted on a lateralprojection along the axis of said pivotable beam and moving in avertical plane perpendicular to the cutting plane of the top blade,guiding means at the sides of each of said two top blades includingadjustable guide elements.
 2. A sheet metal cutting device in accordancewith claim 1, including actuating means for independently and separatelyoperating each of said two top blades.